Detrital zircon geochronology of the Grenville/Llano foreland and basal Sauk Sequence in west Texas, USA

Spencer, Christopher J.; Prave, Anthony R.; Cawood, Peter A.; Roberts, Nick M.W.

doi:10.1130/b30884.1

Cited by 63 publications

(57 citation statements)

References 74 publications

(81 reference statements)

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“…These post-orogenic sedimentary successions are represented by a NeoproterozoiceCambrian outcrop (w950 to w500 Ma) belt that spans the eastern margin of Laurentia from Texas to Newfoundland and from there into Wheeler, 1964;Cawood and Nemchin, 2001;Gower, 2009;Kamo et al, 2011;Scotland after Rainbird et al, 2001;Kirkland et al, 2008;Lancaster et al, 2011). Pre-, syn-, and post-orogenic depositional ages based upon previous studies are discussed in Sections 2.2 and 2.3. northern Scotland and eastern Greenland (Cawood et al, 2007a, b and references therein;Spencer et al, 2014b). Additionally, detritus from the Grenville Orogen was dispersed across the entire expanse of Laurentia and is preserved in Neoproterozoic sedimentary successions extending to the western and northernmost margins of the craton (Rainbird et al, 1997;Dehler et al, 2010;Rainbird et al, 2012;Spencer et al, 2012).…”

Section: Post-orogenic Successionsmentioning

confidence: 96%

“…Although these sedimentary successions have limited the extent of present exposure, syn-orogenic sedimentary rocks have been identified in West Texas (Lanoria/ Hazel formations; Spencer et al, 2014b), Ohio (Middle Run formation; Santos et al, 2002), southern Ontario (Flinton Group and equivalents; Sager-Kinsman and Parrish, 1993), eastern Labrador (Battle Harbour Group; Kamo et al, 2011), and northern Scotland (Applecross/Aultbea formations and Morar Group; Kinnaird et al, 2007;Krabbendam et al, 2008). These syn-collisional basins developed during discrete alternating pulses of compression and extension/collapse within the over-thickened crust between w1190 and 1100 Ma (Cawood et al, 2007b).…”

Section: Syn-orogenic Successionsmentioning

confidence: 99%

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Generation and preservation of continental crust in the Grenville Orogeny

Spencer

Cawood

Hawkesworth

et al. 2015

Geoscience Frontiers

127

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a b s t r a c tDetrital zircons from modern sediments display an episodic temporal distribution of U-Pb crystallization ages forming a series of 'peaks' and 'troughs'. The peaks are interpreted to represent either periods of enhanced generation of granitic magma perhaps associated with mantle overturn and superplume events, or preferential preservation of continental crust during global collisional orogenesis. The close association of those peaks with the assembly of supercontinents implies a causal relationship between collisional orogenesis and the presence of zircon age peaks. Here these two end-member models (episodic periodicity of increased magmatism versus selective preservation during collisional orogenesis) are assessed using U-Pb, Hf, and O analysis of detrital zircons from sedimentary successions deposited during the w1.3e1.

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Section: Post-orogenic Successionsmentioning

confidence: 96%

Section: Syn-orogenic Successionsmentioning

confidence: 99%

Generation and preservation of continental crust in the Grenville Orogeny

Spencer

Cawood

Hawkesworth

et al. 2015

Geoscience Frontiers

127

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“…Notably, recent detrital zircon studies have demonstrated that the Sauk Sequence resulting from the transgression of cratonic Laurentia was not initiated in west Texas (USA) until the Cambrian, significantly later than along its eastern and western margins (Spencer et al, 2014). The fact that the first benthic trilobites reflect geographic differentiation between the two continental masses, the olenellids in Laurentia and the redlichiids in Gondwana (Brasier, 1992;Fortey et al, 1996;Lieberman, 2003;Álvaro et al, 2013), suggests significant separation prior to the start of Cambrian Stage 3 (ca.…”

Section: Growth Of the Iapetus Ocean Basinmentioning

confidence: 98%

Cambrian transgression and radiation linked to an Iapetus-Pacific oceanic connection?

Dalziel

2014

Geology

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“…2,3,and 4). These strata were deposited during the Sauk transgression (e.g., Sloss, 1963;Hogan et al, 2011;Amato and Mack, 2012;Spencer et al, 2014), which spanned the interval from latest Proterozoic to mid-Ordovician time, while the recently rifted passive margin was still experiencing the waning effects of thermal subsidence (Levy and Christie-Blick, 1991;Haq and Schutter, 2008;Spencer et al, 2014). In other words, the combined effects of subsidence and sea-level rise created accommodation that was fi lled by White-Inyo detritus.…”

Section: White-inyo Rangementioning

confidence: 99%

Detrital zircon geochronology of Neoproterozoic–Lower Cambrian passive-margin strata of the White-Inyo Range, east-central California: Implications for the Mojave–Snow Lake fault hypothesis

Chapman

Ernst

Gottlieb

et al. 2015

Geological Society of America Bulletin

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Correlation of lithotectonic packages across major transcurrent structures is critical to understanding the tectonic evolution of the North American continental margin.Detrital zircon geochronology of uppermost Proterozoic to Lower Paleozoic mio geo clinal strata from the White-Inyo Mountains permits evaluation of: (1) the age and provenance of these metasediments and (2) a model for truncation of the passive margin along a postulated large-magnitude Cretaceous dextral shear zone, i.e., the Mojave-Snow Lake fault. U-Pb ages of detrital zircons from the Neoproterozoic Wyman Formation, the upper most Proterozoic Reed Dolomite (Hines Tongue Member), and clastic strata of the Lower Cambrian Deep Springs, Campito (Montenegro Member), Poleta, and Harkless formations refl ect ultimate derivation from the adjacent 1.7-pre-1.8 Ga Mojavia terrane and/or 1.7-1.8 Ga Yavapai continental basement, with subsidiary sources in both the ca. 1.4 Ga Yavapai-Mazatzal anorogenic granitoids and the >2.5 Ga North American craton, and a small proportion of 1.0-1.3 Ga grains, most likely reworked from Grenville clastic wedge deposits. Detrital zircon age spectra from the Lower Cambrian Andrews Mountain Member of the Campito Formation are unique in comparison with the remainder of the studied section, containing a major age peak centered at ca. 1.1 Ga and a subsidiary Lower Cambrian age peak, permitting calculation of a ca. 527 ± 12 (2σ) Ma maximum depositional age. These features, in addition to abundant detrital magnetite-ilmenite grains, refl ect a distal source for these rocks, most likely from the ca. 1.1 Ga Pikes Peak batholith and/or the Midcontinent rift and ca. 0.53 Ga bimodal intrusions of the Oklahoma-Colorado aulacogen. In terms of zircon age distribution, allochthonous metamorphic pendants in the Snow Lake terrane of the central Sierra Nevada batholith are most similar to those of stratigraphically equivalent units in the Death Valley region and, to lesser degrees, the White-Inyo section, and the Mojave Desert region. Given the similarity and relative proximity of Death Valley facies assemblages to the Snow Lake terrane, we suggest that the latter was not transported northward from the Mojave Desert region and instead represents footwall assemblages of a late Early to early Middle Jurassic lowangle normal fault system, probably along the outer transform-truncated margin of the Last Chance thrust stack. This model implies a few tens of kilometers of offset, in contrast to the hundreds of kilometers required by the Mojave-Snow Lake fault hypothesis.

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Detrital zircon geochronology of the Grenville/Llano foreland and basal Sauk Sequence in west Texas, USA

Cited by 63 publications

References 74 publications

Generation and preservation of continental crust in the Grenville Orogeny

Generation and preservation of continental crust in the Grenville Orogeny

Cambrian transgression and radiation linked to an Iapetus-Pacific oceanic connection?

Detrital zircon geochronology of Neoproterozoic–Lower Cambrian passive-margin strata of the White-Inyo Range, east-central California: Implications for the Mojave–Snow Lake fault hypothesis

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